staging: comedi: introduce comedi_buf_n_bytes_ready()

[mirror_ubuntu-artful-kernel.git] / drivers / staging / comedi / drivers / das16m1.c

diff --git a/drivers/staging/comedi/drivers/das16m1.c b/drivers/staging/comedi/drivers/das16m1.c
index ec039fbff0f9b1583e5013dc1d2dea443db0db27..c252ad22b1b403117a6b16843e86384a32a9e0c4 100644 (file)
--- a/drivers/staging/comedi/drivers/das16m1.c
+++ b/drivers/staging/comedi/drivers/das16m1.c
@@ -477,7 +477,7 @@ static int das16m1_poll(struct comedi_device *dev, struct comedi_subdevice *s)
        das16m1_handler(dev, status);
        spin_unlock_irqrestore(&dev->spinlock, flags);
 
-       return s->async->buf_write_count - s->async->buf_read_count;
+       return comedi_buf_n_bytes_ready(s);
 }
 
 static irqreturn_t das16m1_interrupt(int irq, void *d)